Collecting data about CQS-related problems

CQS problems can appear in various ways and, like the IMS control region, they can manifest themselves in the form of WAITs, HANGs, LOOPs, or some other type of internal error that results in an SDUMP being taken.

These dumps are in the SYS1.DUMP data sets. CQS can also produce LOGREC data set entries for these types of errors.

If an isolated event type within CQS encounters an error, then IBM® Software Support might request additional CQS-trace level settings for the various trace types.

For a CQS WAIT problem, one or more inflight dumps might be required. Multiple dumps might need to be taken if the problem is a LOOP. If a structure rebuild or structure checkpoint related problem occurs, you will also need to dump the CQS address spaces for any CQS associated with the given structure, and save the associated SRDS (structure recovery data set) for the CQS structure checkpoints and CQS system checkpoints.